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y�P.cs F MINNFS. Minnesota Department of Natural Resources • Metro Waters - 1200 Warner Road, St. Paul, MN 55106-6793 110°, Telephone: (612) 772-7910 Fax: (612) 772-7977 u- July 31, 1997 Mr. Jim Ericson Community Development Department City of Mounds View 2401 Highway 10 St. Paul, MN 55112 Re: Silver Lake Estates, Inc., Unnamed Wetland 62-258W, City of Mounds View (City Planning Case #495-97),Ramsey County Dear Mr. Ericson: We have reviewed the site plans dated July 11, 1997(received July 28, 1997) for the Silver Lake Estates,Inc. proposal (SW1/4, SE1/4, Section 6,T3ON-R23W) and have the following comments to offer: 1. Unnamed Wetland 62-258W is on the proposed site. While Unnamed Wetland 62-258W is shown on . the Public Water Inventory Map,it has been shown that the wetland does not meet the requirements for being a DNR Protected Water. Unnamed Wetland 62-258W is not under DNR jurisdiction and is not protected by the DNR The wetland may be regulated under the Wetland Conservation Act or by the U.S. Army Corps of Engineers. The DNR may submit comment for Silver Lake Estates in relation to these other programs. 2. It is good to note that most of the stormwater appears to be treated in stormwater ponds. However,it is unclear if the stormwater from the one-story office building will be treated. We strongly recommend the treatment of stormwater in sedimentation ponds. Untreated stormwater will cause pollution that will negatively impact the recreational, aesthetic,wildlife and property values downstream of Silver Lake Estate-s. 3. It is good to see the large number of trees that will be planted for Silver Lake Estates. The trees will appear to be out-of-place amidst the very large amount of pavement proposed for Silver Lake Estates. The site flows into Silver Lake. Studies indicate that the quality of lakes decline as the amount of impervious surface within their watershed increases. We recommend that the impervious surface of Silver Lake Estates be reduced as far as practical to protect Silver Lake. 4. There should be some type of dedicated easement, covenant or deed restriction that will preserve the wetlands on the property in their natural state. This would help to ensure that property owners are aware that the U.S.Army Corps of Engineers,the City of Mounds View,and the Rice Creek Watershed District have jurisdiction over the areas and that the wetlands cannot be altered without appropriate permits. 5. The Flood Insurance Rate Map for the City of Mounds View depicts a designated floodplain with a 100-, • year flood elevation of 905'on the site of Silver Lake Estates. The structures and roads must comply with the floodplain regulations of the City of Mounds View,and the Rice Creek Watershed District. DNR Information: 612-296-6157. 1-800-766-6000 • TTY: 612-296-5484. 1-800-657-3929 An Equal Opportunity Employer IS Printed on Recycled Paper Containing a Who Values Diversity ecistt, Minimum of 10"i Post-Consumer Waste